Driving mechanism for rope and chain railways



C. BAUM.

DRIVING MECHANLSM FOR ROPE AND CHA'N RAILWAYS.

APPLICATION FILED MAR 31. 1921..

1,42 ,451. Patented Aug. 22; 1922.

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Railways, of which'the umran sraras t n't" crates.

. CARL BAUMQOE naLnn-on-rnrasanrin, enniiranir. I

imivme mnc -raiv siu non norm AND 01mm itairwny To all an 7mm it may concern: I

Be it known that I, CARL BAUM, a citizen of the German Republic, and aresident of Halle-on-the-Saale, Germany, have invented certain. new and useful Improvements in Driving Mechanisms for Rope and Chain following is a specification I Drivingmechanisms, which are provided with a plurality of grooved pulleys for the driving means, suffer, as'it is known, from the drawback, that the first driving pulley, upon which the highest rope tension acts, is

subjected to more wear and tear than the subsequentpulleys. On account of their reare driven by electric motors of high speed require several intermediate gearings in orderto obtain the slowest circumferential velocity of the driving pulleys.

It has been proposed to obviate said drawbacks by employing planet-gears with conesh'aped gear-wheels, as they are employed for instance in the construction of automobiles as equalizing gears. The disadvantage of this arrangementhowever is that said planet-gears effect oiily the equalization of the tension, and not a transmission into slow speed. In order to attain the latter, numerous constructive parts must still be added besidesthe planet-gears so that the driving mechanisms become very complicated and expensive. Driving mechanisms, actually constructed as described before, are for instance provided with 12 gear-wheels,

, 4 shafts, several hollow shafts with the'ape propriatev bearings -et cetera A further drawback of these constructions is, that the cone-shaped planet gears produce axial thrusts, which must be obviated again by the introduction of further constructive parts.

The essence of my new invention consists in the fact, tha't the driving motion is transmitted to the driving pulleys through a planet-gearing, of which the driving pulleys form individual parts, the arrangement be ing made in such amann r, that by said Specification of Letters Patent.

I Patented Aug. 225, 1922. a lication filed March a1, 1921. Serial Iva iamb c. I

planet gearing a transmission into slow speed iseiiected besides the equalization of "the pulling force of the rope. An especially v important embodiment, in which only-spurgeanwheels are employed, V1 is the arrange ment, that, when the driving pulleys are disposed abreast each other, the rope wound first around the rotating arm of thefplanetgearing, which arm. is formed as rope-pulley and besides is wound around the guidewneel, which too is formed as rope pullev,

while the driving is effected bythe second guide-Wheel. i

. The transmission into slow-speed, 10btained in the planet-gearing itself, is in the ratio of 1 :2.

In the accompanying dravving,'in which of my invention areiillust'rated Fig. 1 is a partial front-view and partial several embodiments of the subject-matter section of gearingwith internaltoothing;

Fig. '2 is a side-view of said gearing, seenfron i thedeft side' of Fig. 1/ 1 1g. 3 1s a partial front view and partial Figs. 45 and 5 represent in diagrammatical manner a "side-view anda plan-view of a; further form of construction'ofthesubject matter of my invention.

In Figs. 1 and 2 the reference numerals? around which the rope 14 is woun'd,'a rope roller (tension-roller) 15 beingjemployedl in the known manner. The rope 1' enters first upon theupperportion of one of the driveand '9 indicate the two driving pulleysfy'fipulleys and encircles thesame, then runs around the tension-roller15 and from there to the lower portion of theseco'nd drivepulley and runs out-from the upper portion of saidupulleyL-' Y i The bearings 1, porting frame '16 and in these hearings the shaft 2 is fixedly arranged. On said shaft 2 is loosely rotatable the" driving beltpulley 3, to which the gear-wheel t ("which corre-- sponds to a guide-wheel of theplanet-gean 1 are mounted on the sup ing) is rigidly connected. The belt pulley v 1s driven in the known manner from a moto'r or a counter-shaft. I The gear wheelfla meshes with the gear-wheel 5, which is keyed to the shaft 6. The latter is rotatably mounted in the driving-pulley 7 (which corresponds to the rotating arm "of the planetgearing) and supports the pinion 8, which is keyed to-it, saidpinion "meshing withthe internal toothed rim of the drive-pulley 9 1 a section of a gearing with external toothing,

(The latter corresponds to the second guidewheel of the planet-gearing, while the parts 5 and 8 correspond to the rotating-wheels.)

When new the l cit-pulley 3 is driven in the direction of the arrow 10, the planetwheel 5 will rotate in the direction of the arrow 11. The pinion 8 has the same direction of rotation and accordingly effects a rotation of the pulley 9 in the direction of the arrow 12. As the pulley too is loosely mounted upon the shaft 2 and as the shaft 6 is mounted in said pul ey, the latter is rotated by the counter-pressure, produced by the-pinion, in the direction of the arrow 13. The shaft and with it the gear-wheel 5 accordingly rotate concentrically to the centre of the shaft 2. The pressure, caused by the teeth of the pinion 8, effects an exactly equally strong counter-pressure on the. bearing of the shaft 6. Accordingly the pulleys 7 and 9 must rotate, if the load of the same is assumed to be equal, with the same circumferential velocity, but in opposite directions. If it is now further assumed, that first the pulley 7'is braked or locked, then the gear-wheels act as ordinary transmission wheels and the circumferential velocity of the pinion 8 is completely transmitted to the internal toothed rim of the pulley, If however it is assumed, that the pulley 9 is braked or locked, the pinion 8 will move along the internal toothed rim of said pulley and thereby carries along the pulley 7 with the aid of the shaft 6. The tooth pressure (action) on the pulley 9 and the counter-pressure (reaction) on the pulley 7 have always exactly equal strength, and here always a theoretically perfect state ofequilibrium must prevail. The latter can not be disturbed in any way by unequal Wear of the driving pulleys or by thickening of the rope or other operative conditions, as a change of the load of one of the pulleys results immediately in an equivalent change of the load of the other pulley. The circumferential velocity of the pinion is party transmitted actively on the pulley 9 and to the other part reactively on the pulley 7. Accordingly a transmission into slow speed in the ratio of 1 to 2 takes place without regard to the ratio of transmission of the gearwheels. This mode of operation represents the essence of the present invention. All other advantages, as conceivably slightest expenditure of material, the presence of only few constructive parts, lowest cost of manufacture and slight need of space are the results of this novel transmission into slow speed.

The form of construction illustratedin Fig. 3 corresponds exactly to that shown in Figs. 1 and 2 with the exception of the driving pulley 9, which is provided with an external toothed rim, instead of an internal one.

In the form of construction illustrated in Figs. 4.- and 5 the driving belt-pulley 17 is loosely rotatably mounted on the shaft 18 and is rigidly connected to the gear-wheel 19. The latter meshes with the gear-wheel 20. lVithin the gear wheel 21 a. shaft is loosely rotatably mounted, to which the gear-wheel 20 and the pinion 23, meshing with the internal toothed rim of the driving pulley 22, are keyed; The rotating movement is transmitted to the driving pulley 26 by means of the gear-wheels 24; and 25. The pulley 27 represents the usual tensioning pulley or roller. The directions of rotation the wheels and pulleys are indicated in 4 by'arrows. The pulley 22 and the gear-wheel 21 are shown in this view as arranged behind each other and have different directions of rotation. The arrow indicated by a shows the direction of rotation of the pulley 22, while the not indicated arrow shows the direction of rotation of the gear-wheel 21. The course of the rope is also indicated by arrows. As it may be seen from the drawing, in this form of construction the r0 3e pulleys 22 and 2G not arranged abreasteach other, but are mounted in the same plane behind each other on different shafts.

Having thus particularly described the nature of my invention, what l claim as new and desire to secure by Letters Patent of the United States is: r

1. Driving mechanism for ropeand chain-railways comprising in combination two driving pulleys, a tensioning roller for of which said drivingpulleys form parts, the drying force being applied through said planet gearing in such a manner as to equal ize simultaneously the pulling force of the rope and to effect a transmission into slow speed.

2. Driving mechani'snr for rope and chain-railways comprising in combination two driving-pulleys, arranged abreast each other, a tensioning roller for double rope winding, and a planet, gearing, of which said driving pulleys form parts, the rope being wound once around the driving pul'- ley, corresponding to the rotating arm of the planet-gearing and further around the driving pulley correspondingto one of the guide-wheels of the planet gearing and the driving power being applied atthe second guiding wheel so as to effect besides the equalization of the pulling force of the rope through the planet gearinga transmission into slow speed in the ratio of 1 :2. l

In testimony whereof I affix my signa ture in presence of two witnesses. I

CARL BAUM.

Witnesses:

HEINRICH FOHMER, VVILHELM Kome. 

